You will need to be able to explain and complete calculations on curves in both distance-time and velocity-time graphs. This example uses a velocity-time graph. Look at the graph and explain the ...

Velocity-time graphs show how the velocity (or speed) of a moving object changes with time. These graphs also show if the object is moving at a constant speed or accelerating, decelerating, or still.

This is a classic introductory physics problem. Basically, you have a cart on a frictionless track (call this m 1) with a string that runs over a pulley to another mass hanging below (call this m 2).